文档介绍：六年级数学总复****简便计算练****题
一、口算。(10分)
10-= 0÷= 0 9×= 24÷=60 += 6+= +=--=5-3=2 80×=80*=10 ÷3×=*×=
二、用简便方法计算下面各题。(90分,4×20+5×2)
1125-997 998+1246 4++5+ 12-(1+2) 400÷125÷8 25×(37×8)
=1125-(1000-3) =(998+2)+(1246-2) =(4+5)+(+)=12-2-1 =400÷(125*8)=25*8*37
=1125-1000+3 =1000+1244 =10+10=20 =10-1=8 =400÷1000= =200*37=7400
=125+3=128 =2244
(-)×12 1×2× 34×(2+) 125× +++ ×99+
=(-)*12 =×2× =34×2+34× =125*(8+) =(+)+(+)=*(99+1)
=*12 =(×)*2 =68+13 =125*8+125* =8+8=16 =*100=340
=1 =1*2=2 =81 =1000+100=1100
-- 17-3-4 ÷2+× ××32 ---
=-(+) =17-4-3 =÷+× =**32 =--(+)
=-10 =13-3=9 =*+× =1 =17-7=10
= =(+)×=
(++)×72 -3-(2-1) ×11- 43×+×- ×(-÷)
=×72+×72+×72 =4+1-(3+2) =*(11-1) =43×+57×- =×(-*)
=11*6+7*4+5*3 =6-6=0 =1887 =(43+57-1) =*(-)
=66+28+15 =*100=50 =*=
=109
÷+×-4÷3 ×+× -- +++ +++ -(+)
=*+×-*1 =2*6+2*6 =-(+) =4+3+6+5 =(+)+5+3= --
=(+-1) =2*2*6 =-8=3 =4+5+(3+6)=10+9=19 =2- =1
=*6=8 =10+10=20
+++ ++ -+ +-++ +++ 5--
=4+2+5+7 =++ =+- =+-+(+)=+++ =5-(+)
=4+5+(2+7)=10+ =70-- =+5=5 =++(+)=2 =5-4=1
=10+10=20 =14 =53
++++ -- ×+÷6 ×++×% ×÷ +(-)
=(1+9+99+999+9999) = -(